Reductant Level Sensor A Circuit High

Where it lives

For P203D, the sensor sits on the circuit this code reports. The description of P203D reports a fault at the sensor.

Check these first

• An open in the reductant level sensor A signal wire
• A short to voltage on the sensor A circuit
• A failed reductant level sensor A
• A poor sensor A ground connection

What to do next

1. Read the reductant level sensor A voltage on a scan tool
2. Test the sensor A signal wire for an open
3. Test the sensor A circuit for a short to voltage
4. Check the sensor A ground connection
5. Replace the reductant level sensor A if the circuit tests good
6. Clear the code and retest

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